Narrow-wide teeth prevent chain drop, updated tooth profile runs quieter Durable 4mm thick 7075-T6 aluminum with reversible laser etched graphics Compatible with 9-11 speed chains, allowing a 1X set up on most any drivetrain (works with SRAM 12sp, but not Shimano 12sp chains) 30T rings are threaded for standard M8x0.75 chainring bolts TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Model 104 NW Ring Type Single (Anti-Chain Drop) Mount 4x104mm Teeth 34 Oval/Round Round Color Purple Size 34T